Finally beat this one (had to use a health cheat as I got tired of repeating certain areas like the Sabretooth battle.) I was quite surprised to see what comes after the credits finish rolling. I'd set my DS down and was just letting them roll by then I had to scramble to grab the controls.
Overall, I would've liked more exploration and a usable map feature like Web of Shadows had. Not sure if I'll replay it just to get the other bits of hidden stuff (comic covers, extra costumes); maybe if a cheat comes out to unlock the bonus bits...